Fertilising guide
How to fertilise Dark Velvet Kohleria (Kohleria 'Dark Velvet')— schedule & NPK
Also called Dark Velvet Kohleria.
More about dark velvet kohleria
About Dark Velvet Kohleria
Kohleria 'Dark Velvet' · also called Dark Velvet Kohleria · houseplant
Dark Velvet Kohleria is a striking rhizomatous gesneriad hybrid with near-black, velvety foliage with red-purple overtones and tubular, jewel-toned flowers that contrast beautifully against the dark leaves. Easy to grow, it thrives in bright indirect light, moderate humidity above 50%, and moist but well-drained soil. A rewarding, continuous-blooming houseplant.
Growth habit: Upright, bushy rhizomatous herb with densely velvety, near-black opposite leaves and clusters of tubular flowers along the stems; produces scaly rhizomes that spread slowly in the pot
What fertiliser dark velvet kohleria actually wants — and why
Dark Velvet Kohleria is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for dark velvet kohleria: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed dark velvet kohleria, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For dark velvet kohleria:
Feed every 2 weeks during spring and summer with a balanced or slightly phosphorus- and potassium-rich liquid fertiliser at half strength. Resume feeding when new growth emerges if the plant went dormant. Do not fertilise in winter or during dormancy. Treat that as every 2 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when dark velvet kohleria is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for dark velvet kohleria
Half strength is the safe default for dark velvet kohleria — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water dark velvet kohleria first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the dark velvet kohleria watering schedule.
Signs you are over-feeding dark velvet kohleria
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for dark velvet kohleria:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding dark velvet kohleria
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full dark velvet kohleria care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of dark velvet kohleria with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for dark velvet kohleria
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising dark velvet kohleria — frequently asked questions
What fertiliser does dark velvet kohleria need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Dark Velvet Kohleria is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed dark velvet kohleria?
Feed every 2 weeks during spring and summer with a balanced or slightly phosphorus- and potassium-rich liquid fertiliser at half strength. Resume feeding when new growth emerges if the plant went dormant. Do not fertilise in winter or during dormancy. Feed every 2 weeks during spring and summer with a balanced or slightly phosphorus- and potassium-rich liquid fertiliser at half strength. Resume feeding when new growth emerges if the plant went dormant. Do not fertilise in winter or during dormancy. Treat that as every 2 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for dark velvet kohleria?
Half strength is the safe default for dark velvet kohleria — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding dark velvet kohleria look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding dark velvet kohleria year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of dark velvet kohleria?
Flush the pot of dark velvet kohleria with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Dark Velvet Kohleria care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water dark velvet kohleria — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise hairy-leaf tylecodon
- How to fertilise glandular-stemmed monanthes
- How to fertilise atlantic monanthes
- All 8452 fertilising guides in the Growli library